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1 item @ $40.00  

Mixed Minerals

Friday, 12 May 2023 05:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including ferristrunzite, kolbeckite, metaswitzerite, and meurigite-k and more from places like Mont-des-Groseillers, Blaton, Mons, Henegouwen, Belgium, Christy dep., Magnet Cove, Hot Spring Co., Arkansas, United States, Iron Knob, Eyre Peninsula, South Australia, Australia, and Sapucaia mine, Galileia, Doce valley, Minas Gerais, Brazil.

Ferristrunzite

#BAC61669
Locality
Mont-des-Groseillers, Blaton, Mons, Henegouwen, Belgium 
Formula
Fe3+Fe3+2(PO4)2(OH)3·5H2
Availability
Available
Price
$85.00
Size
5 x 3 x 2 cm - Miniature 
Tagged
phosphate  

White radiating, fibrous Ferristrunzite groups to 2mm.


Ferristrunzite

Formula
Fe3+Fe3+2(PO4)2(OH)3·5H2
Crystal System
Triclinic 
Crystal Habit
Acicular, Aggregates 
Cleavage
Good, None, None 
Luster
Vitreous (Glassy) 
Color
brownish yellow, light yellow 
Streak
light yellow 
Class
Triclinic 
Hardness

Kolbeckite

#61665
Locality
Christy dep., Magnet Cove, Hot Spring Co., Arkansas, United States 
Formula
ScPO4·2H2
Availability
Available
Price
$35.00
Size
2 x 1.2 x 1.1 cm - Thumbnail 
Tagged
phosphate  

Yellow tabular crystal to 1mm.


Kolbeckite

Formula
ScPO4·2H2
Crystal System
Monoclinic 
Crystal Habit
Spherical 
Cleavage
Good, Indistinct, Indistinct 
Luster
Vitreous - Pearly 
Color
blue gray, colorless, greenish white, yellowish, light blue 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness

Metaswitzerite

#BAC61676
Locality
Iron Knob, Eyre Peninsula, South Australia, Australia 
Formula
Mn2+3(PO4)2·4H2
Availability
Available
Price
$55.00
Size
3 x 2 x 1.5 cm - Thumbnail 
Tagged
phosphate  

White to pink platy crystals of Metaswitzerite to 3mm.


Metaswitzerite

Formula
Mn2+3(PO4)2·4H2
Crystal System
Monoclinic 
Cleavage
Perfect, Distinct, None 
Luster
Pearly 
Color
brown, golden brown, light yellow brown, light pink 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Micaceous 
Hardness
2.5 
Collection
William & Anne Cook Collection

Meurigite-K

on Cryptomelane - #BAC61666
Locality
Sapucaia mine, Galileia, Doce valley, Minas Gerais, Brazil 
Formula
[K(H2O)2.5][Fe3+8(PO4)6(OH)7]·4H2
Availability
Available
Price
$45.00
Size
2 x 1 x 0.5 cm - Thumbnail 
Tagged
phosphate  

Fuzzy-looking spheroidal crystal groups to 0.25mm. Very rich coverage front and backside.


Meurigite-K

Formula
[K(H2O)2.5][Fe3+8(PO4)6(OH)7]·4H2
Crystal System
Monoclinic 
Crystal Habit
Tabular, Spherical 
Cleavage
Good, None, None 
Luster
Silky 
Color
white, cream, yellowish brown, pale yellow, canary yellow 
Streak
pale yellowish white 
Class
Monoclinic - Prismatic 
Hardness
Collection
William & Anne Cook Collection

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